Periscope



Jan. s, 1924. 1,480,112

H. A. `POFFENHUSEN PERISCOPE Filed July 15 1922 Patented an. S, i324.

narran stares maarre Parser carica.

/ERMAN A. POPPENHUSEN, OF HAMMOND, INDIANA, ASSIGNOR TO GREEN ENGINEER- ING COMPANY, OF .EAST CHICAGO, INDIANA, A CORPORATION OF ILLINOIS.

PERISCOFE.

Application Bled July 15, 192.2. Serial No. 575,244. Y

To all whom t may concern: L

Be it known that I, HERMAN A. PoPrnN- 'Husain a citizen 'of the United States, residin at Hammond, in the county of Lake e and tate of Indiana, have invented new and useful Improvements in Periscopes, of which the following is a specification.

rIhis inventionrelates to periscopes for use with indicating instruments located at points remote from the station of the observer and arranged so that images of said instruments may be visible at said station.

The invention'has particular reference to the use -of periscopes with steam boiler gages set high above the floor of the boiler room, so that they may be easily and conveniently read by workmen standing on the p boiler room vfloor, and thus avoid being required to use a step ladder or other device to reach the gages for reading them as heretofore.

One object of my invention is to provide means whereby the variations registered by the gage while in use may be recorded at the image at the end of the periscope at' theobservers station, and thus be fully advised as to the conditions registered by thev gage.

The invention consists further in the mat- 3@ ters hereinafter described and more particularly set forth in the appended claims. In the accompanying drawings,- Fig. 1 is a side view showing a, perscope of my invention, in position of use with a steam boiler gage; Fig. 2 is an enlarged vertical sectional View of said periscope; and

Figs. 3, 4, and 5 are sectional views taken on 'lines 3 3, 4-4, and 5-5, respectively, 4o cf Fi 2.

In t e drawin 'cfa furnace, 2 t e ioor of the boiler room, 3 the upper water drum just inside the front Wall and vat a considerable distance above the boiler room floor, and 4 aninstrument for indicating the level ofv the water in the boiler. This instrument -is connected with the drum 3 and has a'glass gage tube 5, as customary -in indicators of this general kind.

Arranged in front of the front wall 1 is a periscope. comprising a vertically disposed ronduit 6 having at its upper end a box 7 positioned opposite the glass gage 5 and opening toward the same. In the box is a mirror or 1 indicates the front wail other reflector 8, arranged at the angle shown 1n Fig. 2 to receive an image ofthe glass 5. The lower end of the conduit 6 extends toward the boiler room 2 and is there provided with a box 9 having lan eye piece 10. @0 In the box 9 is a mirror, or reflector 11, arranged at the angle shown in the drawings and '1n a position to be viewed when the]k observer looks into the eyepiece 10. The reflector 11 is aligned vertically with 65 the one 8 at the upper end of the conduit 6 ,i and the arrangement of this is such that the image reflected by the upper reiectOr 8 into the lower one 11 of the glass 'water gage n 5 is an upright one, as indicated by the dot 70 and dash line a, b, in Fig. 2. The eye piece 10 is on the eyeklevel of a workman standing on the boiler room floor 2, and thus is in a position enabling aconvenient andready reading to be had"l at all times of the glass gage 5 lwithout being required to climb up to the. gage to read 1t or to go with an inaccurate and faulty reading by attempting a i reading at a distance asy heretofore.

The eris'cope 6 may be secured in place in 80 any suitable manner, but in Fig. 1, I have shown brackets 12, 13 provided for this purpose. The bracket l12 is connected with the upper box 7 and clamped to the gage pipe, while the lower bracket 13 extends to @5 the front wall of the furnace setting and is bolted or otherwise secured thereto.

The conduit 6 may be constructed in any preferred way. 'In the drawing, however, I have shown the conduit made of a plurality of outside flanges 15 at their meeting endsy to be 'engaged by the tie-bolts'16, as shown in the drawings. rIhese tie-bolts also b'olt the end boxes 7 and 9 to the adjacent sections 14.

During the operation of a boiler, the. water' therein surges back and forth between maximum and minimuml levels with the result that there is a corresponding surge in the glass gage 5. It is diiicultl for the boiler tender to keep in mind the extent of lthis surge, and, iny order to mark the limits of the surge, Ii provide in connection with the lower reflector 11 two ointers or indicators 17, 18, as shown in ig. 3. These are mounted in such a Way that they may be adjusted lengthwise of vthe image appearinv on the reector 11 to mark the maximum and minimum movements of theI surge in the gage tube 5. These indicators, as 'shown 110 in the drawings, are in the form of clips having spring-pressed finger pieces 19, 19, outside of the conduit (i so that they may be readily grasped for adjusting them. rlhe box 9 at the side oit the fingers 17, 18, is provided with an elongated slot 20, as shown same torni as the ones heretofore described,

only on the side ot the box 9 opposite the ones l? and i8, as shown in Fig. 8. This indicator Q11 extends into the box over the retlector ll through an elongated slot 22 provided in the box il, as shown in the drawings, and may be adjusted to indicate the approximately level ot the water in the boiler by being positioned at a point midway between the maximum and minimum extent of the surge which is reflected in the mirror "l *le The. superintendent oi the boiler room oi'ten instructs the boiler tender to maintain the level of the water between two predeter- `mined points. lo mark this, l provide indicators 23 and 2d made like the one previously described and extending through thel slot 22, as shown in Fig. 3.

l/Vhen the boiler tender observes that the surge drops below the indicator 18, heknows that the level of the water in the boiler has dropped and it is time to start the feed pun'ip. To enable him to know whether or not the pump is supplying enough water to bring the water level to the point desired, it is necessary to know at what point the surge dropped prior to starting` the pump. To do this l provide another indicator 25 made like the one previously described and extending into the box l0 over the reflector ll thnough the slot 20. rllhis may be adjusted to the lowest point ot the surge after passing below the indicator 18 and the pump started to replenish the water supply. 'l'he boiler tender can readily tell to what extent the pump is working by'observing` whether or not the level in the image is going above the pointer 25.

Be the device described, easy and convenient reading at all times ot' a boiler gage or other instrument is made possible, even though the instrument is set at such height above the station ot the observer that it can not be readily read from that station. The image of the gage as reiiected in the lower mirror 1l is upright so that the reading of the gage is rendered intelligible and seen as should the gage be viewed by having the observer climb to the height ot' the gage. The provision of these indicators ,associated with the lower reiieetor makes possible the accurate observance or conditions going on with respect to the changing or the water level in the boiler and thus enables the attendant to kee the furnace working efficiently.

l' 7hile l have shown and described herein in detail a device of my invention, it is of course to be understood 'that the details ot construction and arrangement ot parts may be variously changed and modified without departing trom the spirit and scope ot my invention.

ll claim as my invention l. The combination with anv instrument adapted to indicate varying conditions and located at a point remote from the station ot the observer, ot a periscope extending between said instrument and the observers station, said periscope being arranged to cause an image of said instrument to be visin ble at said station, adjustable indicators carried by said periscope at said image 'for recording the variations registered by said instrument, and means for supporting said periscope in piace.

2. The combination. with an instrument for. indicating the level oia liquid in a container and located at a point remote from the station et the observer, oi" a periscope extending between said instrument and the obser ers station, said periscope being arranged to cause an image of said instrument to be visible said station, adjustable means carried by said periscope at the image whereby the maximum minimum levels and any intermediate level of the liquid in the container as registered said instrument may be recorded at said image, and means for supporting said periscope in place.

3. rllhe combination with an instrument for indicating the level ot water in a steam boiler and located at a point remote from the station ot the observer, of a periscope extending between said instrument and the observers station, said periscope being arranged to cause an image ot said instrument to be visible at said station, adjustable means carried by said periscope at the image whereby the extent of surge and the approximate water level registered by said instrument may be recorded at said image, and means tor supporting said periscope in place.

4;. The combination with an instrument for indicating the level ott water in a steam boiler and located at a point remote trom the station of the observer, of a periscope extending between said instrument and the llt) illli observerls station, said periscope being `arranged to cause an image of said instrument to b-e visible at said station, adjustable means carried by said periscope at the image whereby there may be recorded at said image, the extent of surge, the approximate water level to be maintained, and the level f' when the feed pump is started.`

incontra `opposite directions 'and having reflectors therein to cause an image of an object at one end of the conduit to be visible from the other end thereof, one ofsaid boxes having' a slot adjacent the reflector therein, and adjustable indicators to be inserted into said box over said reflector' through said slot.

6. A periscope of the character described, comprising a conduit with outwardly opening boxes at its ends, said boxes facing in opposite directions and having reflectors therein to cause an image of an object at one end of the conduit to be visible from the other end thereof, one of Said boxes having slots therein on opposite sides of the relflector therein., and a set of adjustable indicators to be inserted into said box over said reflector through said slots.

In testimony that I claim the foregoing as my invention, I affix my signature this 12th j day of July, A. D. 1922. 'y

HERMAN A. PoPPENHUsEN. 

